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All About 70-volt Speaker Systems - Belden
https://www.belden.com/blogs/broadcast/all-about-70-volt-speaker-systems/
So the 70-volt distributed speaker systems are mostly confined to low audio-quality applications such as background music or paging. Supermarkets, hotels, hospitals, airports are where you will find 70-volt distributed loudspeaker systems; anywhere you have more than a dozen speakers.
Constant Voltage (70-Volt) Audio Systems For Beginners
https://www.parts-express.com/70-volt-systems-beginners
For the best possible tonal quality, 70V systems can be used with any high-fidelity speaker, including in-wall or ceiling speakers. These speakers are intended for mounting directly into drywall, which is easily robust enough to support them.
The Why and How of 70 Volt Audio Systems
http://erictraining.com/articles/AV/70-volt_cheat_sheet.pdf
1) A 70-volt system allows you to use multiple speakers without worrying about impedance issues, which can overload and damage an 8-ohm amplifier. 2) A 70-volt system allows you to run more speakers off a single amplifier. 3) A 70-volt system plays in mono, not stereo, so speaker placement is not as critical.
70 V Sound System Myths - Professional Audio Training
https://www.prosoundtraining.com/2016/06/23/ten-70-v-system-myths/
The 70.7 volt system gets its name from the RMS (think average) voltage of a pure tone (a sine wave) whose peak voltage is 100 V, which is the highest voltage that, by code, can be present on the line. So, feed a sine wave into the system and turn it up until the “70 V” amplifier clips, and you will read 70 Vrms on the line, which is 100 Vpeak.
70 Volt Audio: Introduction to the Products and Principles ...
https://www.cepro.com/news/70_volt_audio_introduction_products/
Fred Harding November 21, 2018. Long the go-to sound system for commercial venues, 70-volt audio systems are finding their way into residential applications, especially for outdoor music. Custom-centric home-tech vendors (like SpeakerCraft shown here) are rising to the occasion. 70-volt audio was a runner-up for CE Pro's Top 5 Home Technology Trends for …
Amazon.com: 70 volt amplifier
https://www.amazon.com/70-volt-amplifier/s?k=70+volt+amplifier
Common Questions Regarding 70-Volt Audio - AtlasIED
https://www.atlasied.com/blog-constant-voltage-speaker-systems
70-volt systems have lots of phase interference and comb filtering. High density ceiling loudspeakers do indeed exhibit significant phase interference and comb filtering. This is one of the reasons why they can produce even sound coverage. In general, the more loudspeakers, the more interference, the more even the coverage.
25V, 70V, & 100V Constant Voltage Speaker Systems
https://www.lowellmfg.com/wp-content/uploads/What-is-a-25V-70V-or-100V-Speaker-System.pdf
All 70V amplifiers, however, have a 70.7V maximum voltage output level, whether they are 10 watt amplifiers, or 1000 watt amplifiers. That’s where the constant voltage term comes from. That is a handy part of the constant voltage system design. If a system has a 100 watt 70V amplifier and more speakers are added so the load is greater
25V, 70.7V, and 100V Transformers | AtlasIED - Protect ...
https://www.atlasied.com/loudspeakers-horns-transformers
AtlasIED transformers deliver high quality sound in 25V/70V/100V audio systems due to their superior design which reduces frequency loss.
What is a 70v sound system? – TIC
https://ticcorp.com/blogs/default-blog/what-is-a-70v-sound-system-preview-5c104335c7ee3
70v system is a constant voltage distributed sound system, often used in commercial settings due to the ease of installation and design. Under the traditional loudspeaker system design, impedance load has to match the operable range of the amplifier. Since most loudspeakers are 8Ω and amplifiers can handle 4-16Ω, match
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